Single player

Strategy

Turn-based strategy (TBS)

Tactical

aliens

alien invasion

OpenXcom

X-COM: UFO Defense

X-COM: UFO Defense is a strategy game that combines tactical combat with base management and global defense. Players lead an international organization tasked with defending Earth from an alien invasion. The game unfolds on two levels: a global view where players manage resources, research alien technology, and intercept UFOs, and a tactical combat mode where squad-based battles occur. Players recruit and train soldiers, build bases, and develop new weapons and equipment based on recovered alien technology. Missions involve turn-based combat against aliens in various environments, with permadeath adding tension to each engagement. As the alien threat escalates, players must balance research, defense, and offensive operations to protect Earth's nations from panic and alien infiltration. X-COM: UFO Defense's blend of strategic depth, tactical combat, and atmospheric tension creates a compelling gameplay experience in the face of a global alien threat.

Linux

Linux is a free and open-source (FOSS/FLOSS) Operating System. In a more precise and complex definition, Linux is an open-source OS kernel on which a large variety of Operating Systems (known as Linux distributions) are built.

PC (Microsoft Windows)

Bird view / Isometric

Open-source clone of the original UFO: Enemy Unknown / X-Com: UFO Defense by Microprose.

Science fiction

Trailer

Steps to reproduce, what you expected to happen, and what actually happened...

Title is required

You haven't submitted any bug reports yet. Found an issue? Use the button in the bottom-right corner to report it.

No bug reports yet

My Bug Reports

Report a Bug

Title

Briefly describe the bug...

Untitled

Help us understand how the site is used so we can improve it.

We use our own and third-party cookies to improve your browsing experience, analyze site usage and personalize content.

Essential for the site to function: authentication, language and visual theme.

Allow us to remember your preferences and personalize your experience.

Choose which types of cookies you want to accept. Necessary cookies cannot be disabled as they are essential for the site to function.

Cookie settings

Choose a Cover

Price drop!

Best offers

Alternative Titles

Subtitles

Regional Titles

All Terrain

Archaeologist

Archivist

Backlog Guru

Rookie Collector

Connector

Conqueror

Constructive Critic

Curator

Dedication

Editorial Legend

First Cartridge

First Impression

Follower

Full Shelf

Gameplay Master

Genre Explorer

Golden Display

Golden Pen

Get one of your lists to receive 10 or more visits.

Influencer

Level 10

Level 25

Master Collector

Multiplatform

Museum Legend

No Prejudice

Organizer

100%

Physical Present

Platformer

Puzzle Solver

Real Shelf

Serious Library

Sincere

The End

Time Traveler

Veteran Hero

Voice of the People

Welcome

You reached

You are now {title}!

{username}'s Gamification

XP History

{count} games tagged with {keyword} on Shelve·ly. Shelve the ones you paused, mark the ones you finished.

Games tagged with {keyword} on Shelve·ly. Shelve the ones you paused, mark the ones you finished.

Games tagged {keyword}

Similar Games

Trending Keywords

Review title

What did you think of the game?

Add to collection

Name

My Collection

Game lists

Describe the games you want to include using natural language

Create Smart List

Modify the prompt to get a new AI result. The list filters and games will be updated.

Regenerate smart list

Lists

Achievement unlocked!

You have achieved {tierTitle}. Keep it up!

You reached level {level}!

My Notifications

Notifications

You have accumulated {xp} XP. You are doing great!

XP Milestone

The platform you're looking for doesn't exist or has been removed.

Browse and discover {name} platform, its commercial versions, and video games on Shelve·ly. Filter by genre, rating and year.

{name}

Description

The variation you are looking for does not exist.

Platform variation

The platform version you are looking for does not exist.

Platform version

Discover the most notable reviews and opinions about video games

Edit review

The review must be at least 50 characters

Your review has been published successfully

Your review has been updated successfully

Title (optional)

Write a review

Try different search terms or adjust the filters

Search games

Explore games and add the ones that interest you most

Platforms

Game Modes

Perspective

Themes

Keywords

Links

Release Dates

OpenXcom

Description

Media

Related games

Similar Games

Community reviews